Welding SA355-P22
Welding SA355-P22
(OP)
Installing OTSG having issues with welding SA355-P22 Inter-connecting tubing. Repair rate is 60% Welders are experienced & had no issues with pre-job test. Welds are purge with argon pr-heat is 390F. Weld wire specification has an X Factor of below 10 actual 9.6 & J Factor of below 100 actual 99. Would the low X & J factor have any thing to do with the repairs we are experiencing. Defect types are lack of fuision porosity & internal concavity (Suck Back). It is my understanding the J Factor is for base metal & not intended for the weld wire could this be an issue.





RE: Welding SA355-P22
In my years of working around power generation equipment contractor welders that have passed bench tests and then work in the field under adverse conditions can result in the problems you are experiencing. You need A team welders.
RE: Welding SA355-P22
The information below may help you to get through this.
http://bbssystem.com/manuals/Aluminum-Welding/3567...